2011 MAZDA CX-9 Complaints

OUR VEHICLE HAS WATER DRAINS OR "WEEP" LINES FOR THE SUNROOF. WE RECENTLY HAD THE ELECTRICAL SYSTEM STOP/START, DASH LIGHTS REMAIN ON CONSTANTLY AFTER SITTING IN THE DRIVEWAY DURING THE RAIN. WE LEARNED THAT IF THE DRAINS BECOME BLOCKED THAT WATER LEAKS INTO THE CABIN DIRECTLY ONTO THE BODY CONTROL MODULE (BCM). BECAUSE THE BCM IS NOT IN A SEALED OR WATER-PROOF CASE, YET IS SOAKED IN THESE CONDITIONS, THE VEHICLE IS SUBJECT TO ELECTRICAL FAILURE AS A RESULT. REPLACING THE BCM COSTS ABOUT $1,000. WHEN WE STARTED THE CAR THE DASH LIGHTS THAT WARN OF AN ISSUE WITH MANY OF THE VEHICLES SAFETY SYSTEMS REMAINED ON. OTHERS WENT OFF AND SOFT OF FLASHED. WE COULD NOT DETERMINE IF THERE WAS REALLY AN ISSUE WITH ALL OF THE COMPONENTS FLASHING ON THE DASH SO WE DID NOT WANT TO DRIVE IT FOR FEAR OF AN ACCIDENT. OUR VEHICLE WAS STATIONARY (THANK GOD). WE WAITED FOR A WHILE AND WERE ABLE TO LEAVE FOR HOME, BUT THIS CONDITION IS CLEARLY A HUGE SAFETY RISK.

THE VEHICLE WAS IDENTIFIED AT THE DEALERSHIP AS HAVING A LEAKING TRANSFER CASE THAT NEEDED TO BE REPLACED. DURING THIS REPLACEMENT THE TRANSMISSION SPLINES WERE ALSO NOTED TO BE DAMAGED DUE TO THE FAULTY TRANSFER CASE. THEREFORE BOTH THE TRANSFER CASE AND TRANSMISSION NEEDED TO BE REPLACED AT MY EXPENSE.

BRAKE PEDAL IS ROCK HARD AND TAKES IMMENSE PRESSURE TO PRESS DOWN TO GET BRAKES TO ENGAGE. HISSING NOISE COMING FROM UNDER DASH IT SEEMS.

LOSS OF POWER BRAKES. EXCESSIVE BRAKE PEDAL PRESSURE NEEDED TO STOP VEHICLE. HISSING NOISE WHEN DEPRESSING BRAKE PEDAL.

I WAS APPROACHING AN INTERSECTION WHERE I NEEDED TO STOP WITH MY CHILDREN IN THE CAR, I WENT TO HIT MY BRAKE PEDAL AND IT WAS STUCK IN THE UP POSITION AND I COULDN'T STOP, I HAD TO QUICKLY TURN MY WHEEL TO HIT THE SHOULDER OF THE ROAD TO SLOW DOWN AND TO AVOID BEING HIT IN THE INTERSECTION. THE CAR BRAKE THEN EVENTUALLY RELEASED AFTER HEARING A HISSING NOISE AND IT SLOWLY GOING INTO THE DOWN POSITION. WHEN I HAD A MECHANIC LOOK AT IT, HE EXPLAINED THAT IT CLEARLY IS A FAILURE OF THE BRAKE BOOSTER. WE RESEARCHED IT AND FOUND THAT SIMILAR ISSUES HAPPENED WITH MY MAKE AND MODEL IN THE PAST BUT MAZDA DOES NOT WANT TO HONOR THE DEFECT AS ITS SPECIAL SERVICE CALL ON IT ENDED IN 2015.

BRAKE BOOSTER FAILURE, CAUSING BRAKES TO NOT ENGAGE WITHOUT PUMPING THE BRAKE PEDAL. NO CHECK ENGINE OR MAINTENANCE LIGHTS WERE TRIGGERED DUE TO THE FAILURE. ONLY INDICATION WAS ENGINE REVVING WHILE IDLE FOR NO APPARENT REASON AND INABILITY TO BRING THE VEHICLE TO A STOP.

UNINFORMED ABOUT THE 2011 MAZDA CX9 BRAKE PROBLEM WHICH DID NOT SHOW UP UNTIL 8-22-2018, I WAS INFORMED THAT WHILE MAZDA EXTENDED THEIR WARRANTY, THE WARRANTY HAD ENDED IN 4-2018 OR WHEN THE CAR HAD 90,000 MILES LOGGED. (MY CAR IS AT 91,244 MILES.) THE CAR IS UNSAFE TO DRIVE, THE BRAKES ARE SUDDENLY NOT WORKING, AND THIS IS A DOCUMENTED PROBLEM WITH MY MAKE, MODEL, AND YEAR. THERE IS NO MORE IMPORTANT SAFETY FEATURE IN YOUR CAR THAN THE BRAKES. YES, TEENAGE DRIVERS ' THAT'S EVEN MORE IMPORTANT THAN BLUETOOTH CONNECTIVITY. UNFORTUNATELY, OWNERS OF THE 2010-2011 CX-9 HAVE BEEN HAVING PROBLEMS BRINGING THEIR CAR TO A STOP. THE BRAKE SYMPTOMS CX-9 OWNERS, ESPECIALLY THOSE IN HOTTER CLIMATES, HAVE BEEN TELLING HARROWING TALES OF BRAKE PROBLEMS CENTERED AROUND: THE BRAKES BECAME HARD TO PUSH, THERE WAS A HISSING NOISE FROM THE PEDAL AND THE CAR WOULD NOT STOP UNTIL THE BRAKE PETAL WAS PUMPED.

BRAKE PEDDLE STIFF, MAKES HISSING NOISE. AT TIMES WHILE IN TRAFFIC LOSS OF BRAKING ABILITY HAPPENS.

THE BRAKE START LOSING POWER AND NEED TO PUSH REALLY HARD TO STOP.. AND ALSO MAKE LOSING AIR SOUND WHEN PUSH ON BRAKE

CURRENT MILEAGE: 125707. NOTED BRAKE FADE, INSUFFICIENT BRAKING RESPONSE DURING NORMAL CITY DRIVING. THE VEHICLE WAS TOWED TO A LOCATION TO HAVE THE BRAKES EXAMINED. NEW FRONT ROTORS, CALIPERS AND BRAKE PADS WERE INSTALLED. BRAKE SYSTEM BLED AND VEHICLE TEST DRIVEN. NORMAL BRAKING DURING SPEED TESTS OF CITY DRIVING AND EMERGENCY BRAKING. VEHICLE THEN DRIVEN FOR 2-3 DAYS OF NORMAL OPERATION. OPERATOR DRIVING THE VEHICLE AND WHEN BRAKING TO A STOP ON APPROACH TO AN INTERSECTION NOTED THE BRAKE PEDAL WENT TO THE FLOOR BEFORE VEHICLE WOULD SLOW. THE PEDAL HAD TO BE PUMPED TO OBTAIN A MEASURE OF BRAKE RESPONSE. THE VEHICLE TOOK LONGER TO SLOW TO A STOP. ALSO NOTED DURING BRAKING WAS A "HISSING" NOISE WHEN DEPRESSING THE PEDAL. PEDAL WAS THEN PUMPED UP ON APPROACH TO ANY ANTICIPATED STOPPING POINT. VEHICLE TAKEN TO BE CHECKED FOR POSSIBLE AIR IN THE BRAKE LINES. BRAKE SYSTEM CHECKED FOR AIR IN THE BRAKE LINES AND NONE FOUND. TAKEN TO A THIRD-PARTY SHOP FOR ANALYSIS. IT WAS DETERMINED THAT THE MAZDA OEM POWER BRAKE BOOSTER HAD FAILED AND PER THE MECHANIC (NOTE ATTACHED PDF) THE DIAPHRAGM HAD BECOME "BRITTLE" AND THE BRAKE POWER BOOSTER FAILURE CAUSED THE "HISSING" NOISES AND THE BRAKES TO BE CAUSING THE BRAKES TO BECOME UNRESPONSIVE. THE OEM BRAKE BOOSTER HAD TO BE REPLACED. DURING A REVIEW OF ONLINE INFORMATION IT WAS DISCOVERED THAT THE NHTSA HAD CONDUCTED AN INVESTIGATION INTO THE ISSUE OF MASTER BRAKE CYLINDER LEAKAGE REGARDING THIS GENERATION OF MAZDA BRAKE BOOSTERS. THE VEHICLE HAS BEEN IN TO A MAZDA DEALERSHIP FOR PRIOR RECALL REPLACEMENT OF OTHER DEFECTS, HOWEVER THIS POTENTIAL DEFECT WAS NOT ADDRESSED.